65512631 has 2 divisors, whose sum is σ = 65512632. Its totient is φ = 65512630.

The previous prime is 65512619. The next prime is 65512639. The reversal of 65512631 is 13621556.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65512631 is a prime.

It is a super-2 number, since 2×65512631² = 8583809641084322, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 65512594 and 65512603.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65512639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32756315 + 32756316.

It is an arithmetic number, because the mean of its divisors is an integer number (32756316).

Almost surely, 2^65512631 is an apocalyptic number.

65512631 is a deficient number, since it is larger than the sum of its proper divisors (1).

65512631 is an equidigital number, since it uses as much as digits as its factorization.

65512631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5400, while the sum is 29.

The square root of 65512631 is about 8093.9873362886. The cubic root of 65512631 is about 403.1268085651.

The spelling of 65512631 in words is "sixty-five million, five hundred twelve thousand, six hundred thirty-one".